After applying the Version 2 patch I'm having a problem with the patch where it seems that saveBilling() is returning 500 server error on checkout.

This is onepage checkout and I do use PayPal plus if that matters.

When I look at the form data the formkey value is there. So the missing formkey issue doesn't seem to be related to that.

I can disable formkey requirement in the admin side and the problem remains.

My template DOES NOT HAVE any /checkout/ stuff in it, so there are no files to add the often mentioned formkey's too --- that I can find.

Previously mentioned solutions I've tried:

  1. https://gist.github.com/schmengler/c42acc607901a887ef86b4daa7a0445b

-- My template doesn't have a /checkout/ override so nothing to patch

  1. Security Patch SUPEE-9767 - Possible issues?

Been through this thread a dozen times without success.

Any thoughts or suggestions would be greatly appreciated.

*** Update ****

I've chased the problem down to the following:

Call to undefined method Mage_Checkout_OnepageController::isFormkeyValidationOnChecko‌utEnabled();

* I found this function in Action.php *

Any thoughts on why they undefined method call occurring.

  • you can do some test. first change to default theme and check if it is work. the problem is in your theme. also check php error log.Please check and add your error log here. Commented Jul 29, 2017 at 18:03
  • Is skin/frontend/base/default/js/opcheckout.js overridden in your theme? If so, you will need to make the same changes in that file in your theme. Commented Jul 29, 2017 at 18:07
  • is the issue resolved? Commented Jul 30, 2017 at 17:47
  • I'm working to get the information requested still. The problem hasn't been resolved yet.
    – Ericc
    Commented Jul 30, 2017 at 20:33
  • Call to undefined method Mage_Checkout_OnepageController::isFormkeyValidationOnCheckoutEnabled() is the problem here. I did find the function defined in \controller\front\action.php Any idea why its undefined?
    – Ericc
    Commented Jul 31, 2017 at 1:11

2 Answers 2


This issue may cause because of two things.

  1. You are may be overwrite the \app\code\core\Mage\Checkout\controllers\OnepageController.php, this method is not there isFormkeyValidationOnChecko‌​utEnabled();

  2. compiler may be enable. clear cache and recompile again .


Solution Follows

Thank you everyone for pointing me in the right direction. The problem ended up being that


was being overwritten at


This old code was taking precedent over the patched Action.php which includes the new function isFormkeyValidationOnChecko‌utEnabled(); and some other stuff.

In my case two solutions where available.

Solution 1: After inspecting the old Action.php it was found that this file was not required and simply deleting this file allowed the new version of Action.php to take over.

Solution 2: Was to copy the function isFormkeyValidationOnChecko‌utEnabled() and every other change made to Action.php over to the old Action.php to preserve any special behavior the template included in the first place.

  • Good you are resolved the issue :) Commented Aug 2, 2017 at 12:21

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.